Circulatory System of Branchiostoma (With Diagram) | Chordata | Zoology

The blood vascular system of Branchiostoma is of closed type. The blood is colourless and devoid of corpuscles and respiratory pigment. Blood is found not only in blood vessels but also in lymph spaces, around fin-rays, and in metapleural folds. Its main function is to transport the food and excretory wastes. Heart is not found in Branchiostoma. Most blood vessels [...]